Re: at91sam9x5: USB mass storage gadget problems

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Hi,

Alan Stern <stern@xxxxxxxxxxxxxxxxxxx> writes:
> On Thu, 12 Nov 2015, Felipe Balbi wrote:
>
>> >> >> Also, my problem seems to be sensitive to the host port being USB
>> >> >> 3.0 since I have an older Lenovo X201 with USB 2.0 ports that does
>> >> >> _not_ exhibit this problem. IOW when I connect my Arietta G25 mass
>> >> >> storage gadget to the X201, it works properly for all G25 kernels
>> >> >> that I have tried.
>
>> >> I'd blame UDC driver. We have several other UDCs working with the same
>> >> configuration.
>> >
>> > Sounds reasonable to me.  But that doesn't explain why it works okay 
>> > with the older Lenovo X201 laptop.
>> 
>> it seems like only x240 is running > 4.0. What is x201 running ? Could
>> be older, buggy xhci driver.
>
> Or maybe it uses EHCI, since Douglas described it as having USB 2.0
> ports.

yeah, but 64 bytes is still wrong :-)

-- 
balbi

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